NCP1605FORWGEVB ON Semiconductor, NCP1605FORWGEVB Datasheet - Page 11

• Manufacturer Part Number: NCP1605FORWGEVB
• Description: EVAL BOARD FOR NCP1605FORWG
• Manufacturer: ON Semiconductor

Specifications of NCP1605FORWGEVB

• Design Resources: NCP1605FORWGEVB BOM NCP1605FORWGEVB Gerber Files NCP1605 EVB Schematic
• Main Purpose: AC/DC, Primary and Secondary Side with PFC
• Outputs And Type: 1, Isolated
• Voltage - Output: 19V
• Current - Output: 8A
• Voltage - Input: 90 ~ 265VAC
• Regulator Topology: Forward Converter
• Frequency - Switching: 133kHz
• Board Type: Fully Populated
• Utilized Ic / Part: NCP1217, NCP1605
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: NCP1605FORWG
• Other names: NCP1605FORWGEVBOS

Ramp Compensation
subharmonic oscillations. These oscillations take place at
half the switching frequency and occur only during
Sufficient margin shall be kept between normal Pin1 level and the latchoff point in order to avoid false triggering.
Ramp compensation is a known mean to cure
Figure 21. The Skip Cycle Takes Place at Low Peak Currents which Guarantees Noise- -Free Operation
Figure 20. Output Pulses at Various Power Levels (X = 5.0 ms/div) P1 < P2 < P3
300 M
200 M
100 M
0
315.40 U
882.70 U
MAX PEAK
CURRENT
http://onsemi.com
1.450 M
11
Continuous Conduction Mode (CCM) with a duty- -cycle
greater than 50%. To lower the current loop gain, one usually
injects between 50 and 100% of the inductor down- -slope.
Figure 22 depicts how internally the ramp is generated.
2.017 M
CURRENT LIMIT
SKIP CYCLE
2.585 M
Power P1
Power P2
Power P3